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参数资料
| 型号： | DS3920T-001+T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO6 |
| 封装： | ROHS COMPLIANT, SOT-23, 6 PIN |
| 文件页数： | 6/7页 |
| 文件大小： | 1658K |
| 代理商： | DS3920T-001+T |
Maxim Integrated Products 6
DS3920
Fast Current Mirror
Detailed Description
The DS3920 provides a fast, precision current mirror for
photodiode-monitoring applications. The current mirror
is accurate across a large dynamic range. The mirror
response time is fast enough to comply with GPON Rx
burst-mode monitoring requirements. The device has a
built-in current limiting feature to protect photodiodes
from large signal inputs, and an included thermal shut-
down. A diode is provided to limit the voltage at the MIR
output.
Current Mirror
The mirror output is typically connected to an analog-
to-digital converter (ADC) using a resistor to convert the
mirrored current into a voltage. The resistor to ground
should be selected so that the ADC’s full-scale voltage is
reached when the maximum mirrored current is reached.
For example, given that the maximum monitored current
through the APD is 2mA, 1.25V ADC full scale, and a 5:1
mirror ratio, the correct resistor is approximately 3.2kI.
The mirror response time is dominated by the amount of
capacitance placed on the output.
Current Clamp
The device features a current clamping circuit to protect
the photodiode by limiting the amount of current from
Information for available current clamp options.
Diode Protection
A diode is internally connected from the MIR to DIODE
pins. This enables an external voltage applied to DIODE
to limit the voltage on MIR. The voltage applied to DIODE
should be equal to the desired VMIR limit minus the diode
forward voltage drop, or VMIR - VDF.
Thermal Shutdown
As a safety feature, the device has a thermal shutdown
circuit that turns off the MIROUT and MIR currents when
the internal die temperature exceeds TSHDN. The thermal
shutdown mechanism has a built-in hysteresis of THYST.
Thus, the MIROUT and MIR currents resume once the
device has cooled to TSHDN - THYST.
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages.Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains
to the package regardless of RoHS status.
PART
TEMPRANGE
TYPCURRENTLIMIT(mA)
PIN-PACKAGE
DS3920T-001+
-40NC to +85NC
20
6 SOT23
DS3920T-001+T
-40NC to +85NC
20
6 SOT23
DS3920T-002+
-40NC to +85NC
4.4
6 SOT23
DS3920T-002+T
-40NC to +85NC
4.4
6 SOT23
PACKAGETYPE
PACKAGECODE
OUTLINENO.
LANDPATTERNNO.
6 SOT23
U6SN+1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3920T-002+ | 功能描述:电流和电力监控器、调节器 Fast Current Mirror RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| DS3920T-002+T | 功能描述:电流和电力监控器、调节器 Fast APD Bias w/20mA limit RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel |
| DS3922T+ | 制造商:Maxim Integrated Products 功能描述:ADV APD MIRROR W/INT FET & STAT OUT - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC CURRENT MIRROR TQFN |
| DS3923T+ | 制造商:Maxim Integrated Products 功能描述:RSSI SAMPLE/HOLD AND CURRENT MIRROR - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC CURRENT MIRROR TQFN |
| DS3930 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Hex Nonvolatile Potentiometer with I/O and Memory |
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